Mishnah Kelim 10:1-2

Sugya Map: The Mechanics of Tzamid Patil

• Core Issue: Defining the physical parameters of a "tightly fitting cover" (tzamid patil) that renders a vessel impervious to tum'at met (corpse impurity).
• Nafka Minot: Whether a cover must be of a specific material, the degree of seal required, and the status of vessels that do not inherently contract tum'ah.
• Primary Sources: Numbers 19:15, Mishnah Kelim 10:1-2, Sifrei Bamidbar 125.

Text Snapshot

Mishnah Kelim 10:1: "אלו מצילין בצמיד פתיל... כלי גללים, כלי אבנים... וכלי עץ הטהורים." The Tanna lists materials that protect contents. The dikduk here is critical: the Torah specifies "all open vessels" (Numbers 19:15), yet the Mishnah constrains this to specific categories. Note the inclusion of "cattle dung" (galalim); the Tosafot Yom Tov (ad loc.) cites the Sifrei to resolve why non-earthenware vessels qualify: a kal va-chomer—if earthen vessels (which are susceptible to tum'ah) protect, then immune materials surely should.

Readings

• Rambam (Hilchot Tumat Met 21:1): Emphasizes the functional efficacy of the seal over the material. He posits that even a flat wooden board can serve as a tzamid patil if properly sealed, shifting the focus from the vessel's nature to the airtight integrity of the interface.
• Tosafot Yom Tov (10:1:7): Highlights a subtle tension: while the Sifrei derives the protection via kal va-chomer, the Torah explicitly includes them under "all open vessels." He concludes that the kal va-chomer serves as the hechsher, but the verse remains the final source of authority.

Friction

• Kushya: If the Torah emphasizes "open vessels" as the primary vectors of tum'ah, why do we allow materials like dung or stone, which possess vastly different physical properties than porous earthenware?
• Terutz: The Tzamid Patil is not about the material’s structural integrity per se, but its ability to create a chatzitzah (barrier) against the tum'ah as it "seeks" a way in. The airtight seal (tmidah) transforms the air volume inside into an independent, sheltered space.

Intertext

• Numbers 19:15: The foundational verse for tzamid patil.
• Mishnah Oholot 5:4: Discusses the measurement of the seal’s efficacy, contrasting the tzamid patil standard with the general laws of ohel.

Psak/Practice

The principle of tzamid patil informs contemporary halachic heuristics regarding sealing contamination: the "seal" must be physically verified (e.g., lime, wax, or pitch). If the seal is loose or compromised, the entire interior volume is effectively "open" to the tum'ah.

Takeaway

A tzamid patil is not merely a lid; it is a legal act of enclosure that redefines the vessel's interior as a distinct domain, immune to the external environment.